Date:   Tue, 20 Sep 2022 14:31:45 +0200
From:   Frederic Weisbecker <frederic@...nel.org>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     richard.henderson@...aro.org, ink@...assic.park.msu.ru,
        mattst88@...il.com, vgupta@...nel.org, linux@...linux.org.uk,
        ulli.kroll@...glemail.com, linus.walleij@...aro.org,
        shawnguo@...nel.org, Sascha Hauer <s.hauer@...gutronix.de>,
        kernel@...gutronix.de, festevam@...il.com, linux-imx@....com,
        tony@...mide.com, khilman@...nel.org, catalin.marinas@....com,
        will@...nel.org, guoren@...nel.org, bcain@...cinc.com,
        chenhuacai@...nel.org, kernel@...0n.name, geert@...ux-m68k.org,
        sammy@...my.net, monstr@...str.eu, tsbogend@...ha.franken.de,
        dinguyen@...nel.org, jonas@...thpole.se,
        stefan.kristiansson@...nalahti.fi, shorne@...il.com,
        James.Bottomley@...senPartnership.com, deller@....de,
        mpe@...erman.id.au, npiggin@...il.com, christophe.leroy@...roup.eu,
        paul.walmsley@...ive.com, palmer@...belt.com,
        aou@...s.berkeley.edu, hca@...ux.ibm.com, gor@...ux.ibm.com,
        agordeev@...ux.ibm.com, borntraeger@...ux.ibm.com,
        svens@...ux.ibm.com, ysato@...rs.sourceforge.jp, dalias@...c.org,
        davem@...emloft.net, richard@....at,
        anton.ivanov@...bridgegreys.com, johannes@...solutions.net,
        tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
        dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com,
        acme@...nel.org, mark.rutland@....com,
        alexander.shishkin@...ux.intel.com, jolsa@...nel.org,
        namhyung@...nel.org, jgross@...e.com, srivatsa@...il.mit.edu,
        amakhalov@...are.com, pv-drivers@...are.com,
        boris.ostrovsky@...cle.com, chris@...kel.net, jcmvbkbc@...il.com,
        rafael@...nel.org, lenb@...nel.org, pavel@....cz,
        gregkh@...uxfoundation.org, mturquette@...libre.com,
        sboyd@...nel.org, daniel.lezcano@...aro.org, lpieralisi@...nel.org,
        sudeep.holla@....com, agross@...nel.org,
        bjorn.andersson@...aro.org, konrad.dybcio@...ainline.org,
        anup@...infault.org, thierry.reding@...il.com,
        jonathanh@...dia.com, jacob.jun.pan@...ux.intel.com,
        atishp@...shpatra.org, Arnd Bergmann <arnd@...db.de>,
        yury.norov@...il.com, andriy.shevchenko@...ux.intel.com,
        linux@...musvillemoes.dk, dennis@...nel.org, tj@...nel.org,
        cl@...ux.com, rostedt@...dmis.org, pmladek@...e.com,
        senozhatsky@...omium.org, john.ogness@...utronix.de,
        juri.lelli@...hat.com, vincent.guittot@...aro.org,
        dietmar.eggemann@....com, bsegall@...gle.com, mgorman@...e.de,
        bristot@...hat.com, vschneid@...hat.com, fweisbec@...il.com,
        ryabinin.a.a@...il.com, glider@...gle.com, andreyknvl@...il.com,
        dvyukov@...gle.com, vincenzo.frascino@....com,
        Andrew Morton <akpm@...ux-foundation.org>, jpoimboe@...nel.org,
        linux-alpha@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-snps-arc@...ts.infradead.org, linux-omap@...r.kernel.org,
        linux-csky@...r.kernel.org, linux-hexagon@...r.kernel.org,
        linux-ia64@...r.kernel.org, loongarch@...ts.linux.dev,
        linux-m68k@...ts.linux-m68k.org, linux-mips@...r.kernel.org,
        openrisc@...ts.librecores.org, linux-parisc@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-riscv@...ts.infradead.org,
        linux-s390@...r.kernel.org, linux-sh@...r.kernel.org,
        sparclinux@...r.kernel.org, linux-um@...ts.infradead.org,
        linux-perf-users@...r.kernel.org,
        virtualization@...ts.linux-foundation.org,
        linux-xtensa@...ux-xtensa.org, linux-acpi@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-arch@...r.kernel.org, kasan-dev@...glegroups.com
Subject: Re: [PATCH v2 00/44] cpuidle,rcu: Clean up the mess

On Mon, Sep 19, 2022 at 11:59:39AM +0200, Peter Zijlstra wrote:
> Hi All!
> 
> At long last, a respin of the cpuidle vs rcu cleanup patches.
> 
> v1: https://lkml.kernel.org/r/20220608142723.103523089@infradead.org
> 
> These here patches clean up the mess that is cpuidle vs rcuidle.
> 
> At the end of the ride there's only on RCU_NONIDLE user left:
> 
>   arch/arm64/kernel/suspend.c:            RCU_NONIDLE(__cpu_suspend_exit());
> 
> and 'one' trace_*_rcuidle() user:
> 
>   kernel/trace/trace_preemptirq.c:                        trace_irq_enable_rcuidle(CALLER_ADDR0, CALLER_ADDR1);
>   kernel/trace/trace_preemptirq.c:                        trace_irq_disable_rcuidle(CALLER_ADDR0, CALLER_ADDR1);
>   kernel/trace/trace_preemptirq.c:                        trace_irq_enable_rcuidle(CALLER_ADDR0, caller_addr);
>   kernel/trace/trace_preemptirq.c:                        trace_irq_disable_rcuidle(CALLER_ADDR0, caller_addr);
>   kernel/trace/trace_preemptirq.c:                trace_preempt_enable_rcuidle(a0, a1);
>   kernel/trace/trace_preemptirq.c:                trace_preempt_disable_rcuidle(a0, a1);
> 
> However this last is all in deprecated code that should be unused for GENERIC_ENTRY.
> 
> I've touched a lot of code that I can't test and I might've broken something by
> accident. In particular the whole ARM cpuidle stuff was quite involved.
> 
> Please all; have a look where you haven't already.
> 
> 
> New since v1:
> 
>  - rebase on top of Frederic's rcu-context-tracking rename fest
>  - more omap goodness as per the last discusion (thanks Tony!)
>  - removed one more RCU_NONIDLE() from arm64/risc-v perf code
>  - ubsan/kasan fixes
>  - intel_idle module-param for testing
>  - a bunch of extra __always_inline, because compilers are silly.

Except for those I have already tagged as Reviewed:

Acked-by: Frederic Weisbecker <frederic@...nel.org>

Thanks for the hard work!

Powered by blists - more mailing lists